Objectives: To explore the relationship between impairment (skeletal muscle strength and contraction velocity) and function in community-dwelling older adults.
Design: Cross-sectional.
Setting: University-based human physiology laboratory.
Participants: One hundred one men and women (aged 75-90).
Measurements: Muscle strength and contraction velocity during bilateral leg press (LP) were calculated during one-repetition maximum (1RM) and 40% 1RM. A short physical performance battery (SPPB) and gait speed (GS) from a 400-m self-paced walk assessed function. Sex differences in LP strength and contraction velocity (at 40% 1RM) were assessed. The relationship between these variables and function was also examined.
Results: Lower extremity strength and contraction velocity were significantly associated with GS (P=.02 and P=.005, respectively) and SPPB (P<.001 and P=.009, respectively) in men only. Contraction velocity, but not muscle strength, was significantly associated with GS (P<.001) and SPPB (P=.02) in women.
Conclusion: Sex differences exist in the relationship between impairment (muscle strength and contraction velocity) and function. Older men and women may employ different strategies to achieve success on different functional tasks. These findings may have important implications for clinicians practicing geriatric rehabilitation.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1111/j.1532-5415.2005.53166.x | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Modulation of the peak velocities and gains of abduction and adduction saccades according to head position.
Jpn J Ophthalmol
January 2025
Department of Neurology, Yokohama Brain and Spine Center, Yokohama, Japan.
Purpose: To assess the effects of modifying head position and of static ocular counter-rolling (OCR) on abduction and adduction in saccadic eye movements using a head-mounted video-oculographic device.
Study Design: A clinical observational study.
Methods: The peak velocities and amplitude gains of visually guided 12° saccades were binocularly measured in 21 healthy volunteers with their heads in the upright vertical (0°) and horizontal (± 90°, bilateral side-lying) postures, and in 6 participants with their head positions bilaterally tilted by 30°.
Progressive Evolution of Flow and Heat Transfer Channels in Hot Dry Rock Stimulated by Liquid Nitrogen Cold Shock.
ACS Omega
December 2024
School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China.
Hot dry rock (HDR) is a novel green, low-carbon energy. Its development requires the creation of fracture channels in deep thermal reservoirs. Traditional methods such as hydraulic fracturing have limited effectiveness in reservoir stimulation, so a method of liquid nitrogen cold shock was proposed.
View Article and Find Full Text PDFUnmasking the Epicardial Adipose Tissue-Left Atrial Strain Nexus in HFpEF: A Potential Echocardiographic Signature of Cardiac Adaptation.
Echocardiography
January 2025
Ultrasound Medicine Center, Lanzhou University Second Hospital, Lanzhou, Gansu Province, China.
Purpose: This study aims to investigate the relationship between epicardial adipose tissue (EAT) and left atrial function in patients with preserved ejection fraction heart failure (HFpEF).
Methods: We conducted a cross-sectional study involving 113 patients diagnosed with HFpEF and 48 control subjects without heart failure. Echocardiography was performed to assess EAT thickness and left atrial function was quantified using Autostrain left atrium (LA), including left atrial strain during reservoir phase (LASr), left atrial strain during conduit phase (LAScd), and left atrial strain during contraction phase (LASct).
Left Atrial Strain in Omicron-Type COVID-19 Patients.
CJC Open
December 2024
Department of Cardiology, Tel Aviv Medical Center and School of Medicine, Tel Aviv University, Tel Aviv, Israel.
Background: Information about left atrial (LA) 2-dimensional (2D) strain parameters in patients with the Omicron variant of COVID-19 is limited. The aim of this study is to evaluate LA strain (LAS) in COVID-19 patients with the Omicron variant and compare it to that of propensity-matched patients with the wild-type (WT) variant.
Methods: A total of 148 consecutive patients who were hospitalized with Omicron COVID-19 underwent an echocardiographic evaluation within the first day after hospital admission and were compared to propensity-matched patients (1:1) with the WT variant.
Density-dependent flow generation in active cytoskeletal fluids.
Sci Rep
December 2024
Department of Chemical Engineering, Kyoto University, Nishi-kyoku, Kyoto, 615-8510, Japan.
Article Synopsis
- The actomyosin cytoskeleton, made up of actin fibers and myosin motors, creates contractile forces that influence various cellular movements, but its density-related behaviors are not well understood.
- By adjusting the concentration of actomyosin cell extracts, researchers found that in cell-sized droplets, actin flows toward the center at a critical density, creating oscillatory motion.
- The study suggests that changes in myosin activity can disrupt regular oscillatory flows, indicating that the dynamics of actomyosin flow are influenced by the balance between actin density and myosin forces.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!